Zoeller M53 Submersible Sump Pump Review

The Zoeller M53 Mighty-mate Submersible Sump Pump has a lot to offer, specifically in terms of its ⅓ HP, 1½-inch NPT discharge capable of passing through ½-inch spherical solids to prevent clogging, and its vortex impeller design that further assists in removal of solid suspension in water that’s being pumped out of your basement, tanks, and pools, particularly septic tanks.

It also has an excellent filtration system that ensures better removal of even the dankest of flood or swamp water off of your home or your water systems. It also has a switch case, pump housing, and motor that are built with anti-corrosive cast iron.

Zoeller M53 Mighty-mate Submersible Sump Pump Review

Float-Activated Auto Switch On and Off

Aside from the fact that the Zoeller M53 Submersible Sump Pump is made of a high-quality material that ensures it will last a long, long time, it also benefits from an automatic shut-off and start system that allows for mostly hands-free usage of the unit. It automatically switches on and off depending on the presence of water that it’s supposed to pump out of whatever tank or pool it’s placed on and whatnot.

It also has float technology that allows it to activate as a float mechanism inside of it floats up while the water level is up. It shuts off when the floater goes down, indicating that the water levels have decreased and the water from your pool, tank, or basement is gone.

Powerful Motor and Little to No Maintenance Service

Aside from float-activated on/off switch that allows it to detect groundwater, rainwater, or floodwater at a certain height, the Zoeller M53 Submersible Sump Pump also has quite the powerful motor wherein at ⅕ of HP, you can suck dry any flooded area or place where you drain water but the drain is otherwise clogged or malfunctioning (like at a pool or your septic tank).

It has many industrial applications as well, particularly in industrial cooling systems that require better water pumping and drainage after disasters like floods and inclement weather causing downpours.

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Here are the specs of the Zoeller M53 ⅓ HP Mighty-mate Submersible Sump Pump. 

  • Motor: Runs at⅓ HP, making it better than most motors for water pumps save for the ½ HP or 1 HP models out there that do heavy-duty pumping work.
  • Vortex Impeller: Thanks to its non-clogging vortex impeller design, you can enjoy removal of ½-inch spherical solids without clogging and a1½NPT discharge rate from the ZoellerM53 Sump Pump.
  • Rubber Float Tech for Auto On and Off: The Zoeller M53 ⅓ HP Mighty-mate Submersible Sump Pump has an automatic on and off switch that’s float-activated.
  • Cast Iron Durability: Almost everything on the machine’s outer casing is protected by cast iron construction, specifically protecting its motor, switch case, and pump housing.
  • Battery Backup and CSA/UL/SSPMA Certified: On top of its cast iron housing and self-activating technology, the self-maintaining sump pump also has a battery backup included for continuous operation. It’s also certified by the CSA, UL, and SSPMA.

Zoeller M53 Customer Reviews

I love the Zoeller M53 ⅓ HP Mighty-mate Submersible Sump Pump because they can basically take care of themselves. Not only is its housing and construction made of non-corrosive cast iron; it can also turn itself on and off depending on how much water is left on your pool or basement as well as septic tank. You won’t have to worry about forgetting to turn it off and spending extra on your electricity bill. You can leave it to do its job with minimal to no supervision. Of course, to make them last, you still have to do some periodic service.

The Zoeller M53 ⅓ HP Mighty-mate Submersible Sump Pump has received 369 reviews and has a 4.6 rating on Amazon.com. 


There are cons to using the Zoeller M53 ⅓ HP Mighty-mate Submersible Sump Pump. There are complaints by some Amazonian users that allege the Zoeller M53 Sump Pump has a mediocre float switch. This is a major complaint in the sense that the whole self-maintaining, auto switch spiel its marketing loves to point out lives and dies by that floater.

A long-time user of the M53 concludes that the pump switch is the weak link because, in his experience, it’s the first thing that failed within a mere year of usage. His coworker who recommended the pump has his fail after two years. The pump itself is superb, but future Zoeller pump models should have a better switch installed.

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When you take the good with the bad of the Zoeller M53 Submersible Sump Pump, you’ll still see that the good outweigh the bad by a large margin. The cons of having your own Zoeller M53 Sump Pump aren’t even that big or significant. At most, you only need to do periodic service on it since it turns itself on and off, thus it practically runs itself on its own with little to no assistance.

It’s also built with heavy duty non-corrosive cast iron, which makes it resistant to corrosion from water and the chemicals or agents within that water that could damage weaker or cheaper pumps. In many ways, the Zoeller M53 Sump Pump is a gift that keeps on giving the longer it lasts. Check out other best sump pumps here!

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